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mvp的全称为Model-View-Presenter，Model提供数据，View负责显示，Controller/Presenter负责逻辑的处理。MVP与MVC有着一个重大的区别：在MVP中View并不直接使用Model，它们之间的通信是通过Presenter (MVC中的Controller)来进行的，所有的交互都发生在Presenter内部，而在MVC中View会直接从Model中读取数据而不是通过 Controller。
项目中大部分是面对接口编程，通过P层可以预先将所有需要的接口功能写出来，进而进行实现，大大提高了项目高内聚，低耦合。适合于团队开发项目。
今天我们是用MVP的设计框架模板来实现一个ListView的上拉刷新下拉加载更多的功能。
项目结构如下图;
1、首先我们ListViewPresenters.java类，他的作用是，控制M业务逻辑层，去获取我们想要的数据，然后通知V层去更新他们对应的UI。由于我们的需求明确，就是实现Listview的上拉刷新，下拉加载更多，初始化控件，设置上拉下拉刷新监听。因此我们可以先把功能接口都写好，让ListViewPresenters去实现其功能即可。
package com.android.presenters;
import java.util.ArrayList;
import android.support.v4.app.FragmentActivity;
import android.view.View;
import com.android.handlers.ListViewHandle;
import com.android.services.ListViewService;
import com.android.services.si.IListViewService;
import com.android.view.ListViewFerris;
import com.android.view.vi.IListViewFerris;
import com.android.widget.listview.FerrisListView.OnStartListener;
public class ListViewPresenters {
private IListViewFerris iListViewFerris;
private IListViewService iListViewService;
private FragmentActivity mActivity;
private View view;
private int index = 1;
public ListViewPresenters(FragmentActivity mActivity2, View view2) {
// TODO Auto-generated constructor stub
this.mActivity = mActivity2;
this.view = view2;
this.iListViewFerris = new ListViewFerris(mActivity, view);
this.iListViewService = new ListViewService();
}
/*
* 初始化View层里的控件
*/
public void onFindView() {
iListViewFerris.onFindView();
}
/*
* 上啦刷新方法
*/
public void listViewRefresh(int index) {
//post请求数据，获取数据，并且通过handler接口来通知View更新UI
iListViewService.sendPost(index, new ListViewHandle() {
@Override
public void getData(ArrayList<String> msgs) {
// TODO Auto-generated method stub
//通过handler接口来通知UI去更新数据
iListViewFerris.refresh(msgs);
}
});
}
/*
* 下拉加载更多方法
*/
public void listViewLoadMore(int index) {
//post请求数据，获取数据，并且通过handler接口来通知View更新UI
iListViewService.sendPost(index, new ListViewHandle() {
@Override
public void getData(ArrayList<String> msgs) {
// TODO Auto-generated method stub
//通过handler接口来通知UI去更新数据
if (msgs == null) {
iListViewFerris.showLoadingError();//获取数据失败显示通知
iListViewFerris.loadMore(msgs);//停止加载更多
} else {
iListViewFerris.loadMore(msgs);//停止加载更多
}
}
});
}
/*
* 为Listview设置上拉下拉刷新监听
*/
public void setRefreshOrLoadMoreListem() {
// TODO Auto-generated method stub
iListViewFerris.setRefreshOrLoadMoreListem(new Refresh(),
new Loadmore());
}
/*
* 为Listview第一次，自动下拉刷新
*/
public void firstload() {
// TODO Auto-generated method stub
iListViewFerris.firstLoad();
}
/*
* 上拉刷新监听
*/
public class Refresh implements OnStartListener {
@Override
public void onStart() {
// TODO Auto-generated method stub
index = 1;
listViewRefresh(index);
}
}
/*
* 加载更多监听
*/
public class Loadmore implements OnStartListener {
@Override
public void onStart() {
// TODO Auto-generated method stub
listViewLoadMore(++index);
}
}
}
package com.android.view.vi;
import java.util.ArrayList;
import com.android.widget.listview.FerrisListView.OnStartListener;
public interface IListViewFerris {
public void onFindView();//初始化控件
public void showLoadingError();//显示加载错误
public void showLoadingSuccess();//显示加成功
public void setNotifyListView();//刷新Listview
public void refresh(ArrayList<String> msgs);//上拉刷新
public void loadMore(ArrayList<String> msgs);//下拉加载更多
public void setRefreshOrLoadMoreListem(OnStartListener refresh, OnStartListener loadmore);//设置上拉下拉刷新监听
public void firstLoad();//首次自动上拉刷新
}
package com.android.view;
import java.util.ArrayList;
import android.support.v4.app.FragmentActivity;
import android.view.View;
import com.android.adapter.ListViewAdapter;
import com.android.futilssimple.R;
import com.android.utils.ToastUtils;
import com.android.view.vi.IListViewFerris;
import com.android.widget.listview.FerrisListView;
import com.android.widget.listview.FerrisListView.OnStartListener;
import com.android.widget.listview.SimpleFooter;
import com.android.widget.listview.SimpleHeader;
public class ListViewFerris implements IListViewFerris{
private FragmentActivity mActivity;
private View view;
private FerrisListView listView;
private ListViewAdapter adapter;
public ListViewFerris(FragmentActivity mActivity,View view) {
// TODO Auto-generated constructor stub
this.mActivity=mActivity;
this.view=view;
}
//初始化view
@Override
public void onFindView() {
// TODO Auto-generated method stub
if(mActivity==null||view==null){
return;
}
listView = (FerrisListView)view.findViewById(R.id.zListView);
adapter=new ListViewAdapter(mActivity);
// 设置默认偏移量，主要用于实现透明标题栏功能。（可选）
float density = mActivity.getResources().getDisplayMetrics().density;
listView.setFirstTopOffset((int) (50 * density));
// 设置下拉刷新的样式（可选，但如果没有Header则无法下拉刷新）
SimpleHeader header = new SimpleHeader(mActivity);
header.setTextColor(0xff0066aa);
header.setCircleColor(0xff33bbee);
listView.setHeadable(header);
// 设置加载更多的样式（可选）
SimpleFooter footer = new SimpleFooter(mActivity);
footer.setCircleColor(0xff33bbee);
listView.setFootable(footer);
}
//显示加载失败
@Override
public void showLoadingError() {
// TODO Auto-generated method stub
ToastUtils.showToast(mActivity, "加载失败");
}
//显示加载成功
@Override
public void showLoadingSuccess() {
// TODO Auto-generated method stub
ToastUtils.showToast(mActivity, "加载成功");
}
//刷新数据
@Override
public void setNotifyListView() {
// TODO Auto-generated method stub
if(adapter!=null){
adapter.notifyDataSetChanged();
}
}
//填充刷新数据
@Override
public void refresh(ArrayList<String> msgs) {
// TODO Auto-generated method stub
if(msgs!=null&&msgs.size()>0){
if(listView.getAdapter()==null){
listView.setAdapter(adapter);
adapter.setRefresh(msgs);
}else{
adapter.setRefresh(msgs);
}
listView.setRefreshSuccess("加载成功"); // 通知加载成功
listView.startLoadMore(); // 开启LoadingMore功能
}else{
listView.setRefreshFail("加载失败");
}
}
//填充加载更多数据
@Override
public void loadMore(ArrayList<String> msgs) {
// TODO Auto-generated method stub
if(msgs!=null&&msgs.size()>0){
if(listView.getAdapter()==null){
listView.setAdapter(adapter);
adapter.setData(msgs);
}else{
adapter.setData(msgs);
}
listView.setLoadMoreSuccess();
}else{
listView.stopLoadMore();
}
}
//为Listview设置首次自动上拉刷新
@Override
public void firstLoad(){
listView.refresh(); // 主动下拉刷新
}
//为Listview设置上拉以及下拉刷新
@Override
public void setRefreshOrLoadMoreListem(OnStartListener refresh,
OnStartListener loadmore) {
// TODO Auto-generated method stub
listView.setOnRefreshStartListener(refresh);
listView.setOnLoadMoreStartListener(loadmore);
}
}package com.android.services.si;
import com.android.handlers.ListViewHandle;
public interface IListViewService {
//发送post请求
public void sendPost(int index,ListViewHandle handle);
}
业务逻辑才具体实现的功能如下：
package com.android.services;
import java.util.ArrayList;
import android.os.Handler;
import com.android.futils.task.FTaskPool;
import com.android.futils.task.TaskItem;
import com.android.handlers.ListViewHandle;
import com.android.services.si.IListViewService;
public class ListViewService implements IListViewService {
String[] data={"加拿大","瑞典","澳大利亚","瑞士","新西兰","挪威","丹麦","芬兰","奥地利","荷兰","德国","日本","比利时","意大利","英国"};
public ListViewService() {
// TODO Auto-generated constructor stub
}
private Handler handler=new Handler();
private ArrayList<String> msgs;
@Override
public void sendPost(int index, ListViewHandle handle) {
// TODO Auto-generated method stub
switch (index) {
case 1:
getData(index,handle);
break;
case 2:
getData(index,handle);
break;
case 3:
getData(index,handle);
break;
case 4:
getData(index,handle);
break;
case 5:
getData(index,handle);
break;
case 6:
getData(index,handle);
break;
default:
msgs=null;
handle.getData(msgs);
break;
}
}
private synchronized void getData(final int index, final ListViewHandle handle) {
// TODO Auto-generated method stub
handler.postDelayed(new Runnable() {
@Override
public void run() {
FTaskPool.getInstance().execute(new TaskItem() {
@Override
public void doMain() {//在前台显示数据
// TODO Auto-generated method stub
if(handle!=null){
handle.getData(msgs);
}
}
@Override
public void doBack() {//在后台处理数据
// TODO Auto-generated method stub
msgs=new ArrayList<String>();
for(String d:data){
msgs.add(index+"、"+d);
}
}
});
}
}, 2 * 1000);//延迟2秒后执行
}
}
package com.android.fragment;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import com.android.futilssimple.R;
import com.android.presenters.ListViewPresenters;
public class ListViewFragment extends Fragment {
private ListViewPresenters listViewPresenters;
public ListViewFragment() {
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.listviewfragment, container, false);
listViewPresenters=new ListViewPresenters(getActivity(), rootView);//新建一个控制器
listViewPresenters.onFindView();//初始化view
listViewPresenters.setRefreshOrLoadMoreListem();//设置刷新监听
listViewPresenters.firstload();//首次自动上拉刷新
return rootView;
}
}5、源码demo稍后上传
Android MVP设计框架模板 之 漂亮ListView上拉刷新下拉加载更多
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原文地址：http://blog.csdn.net/xufeifandj/article/details/42737505
